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Black 120 mm square case fan with transparent blades, 25 mm thick, 4-pin PWM connector and daisy-chain socket

ARCTIC COOLING

ARCTIC COOLING ACFAN00121A P12 PWM PST CO 120 mm case fan

SKU CH-WXPN-A33NT MPN ACFAN00121A

Pressure-optimised 120 mm case fan runs 200–1800 RPM, delivers 56.3 CFM at 0.3 Sone, and uses fluid-dynamic bearing for continuous operation

  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing designFluid Dynamic
  • Rotational speed200–1,800 RPM
  • Airflow rate56.3 CFM
  • Pressure-optimised airflow at 56.3 CFM for heatsinks and radiators
  • PWM Sharing Technology synchronises multiple fans from one header
  • Fluid dynamic bearing rated for continuous operation
  • 3 sone at 200-1800 RPM keeps noise low
  • 4-pin connector plus 4-pin socket enables daisy-chain control

Pressure-optimised 120 mm fan for continuous

The ARCTIC P12 PWM PST CO is a single 120 mm case fan built for static-pressure tasks such as heatsinks and radiators. It uses a fluid-dynamic bearing and PWM Sharing Technology to run several fans in sync from one motherboard header. The unit ships with four mounting screws and a 4-pin connector plus passthrough socket.

Suited to builds that need focused airflow through

This model fits users who want quiet, pressure-oriented cooling on CPU coolers or liquid-cooling radiators. It is not intended for buyers who need high-volume airflow for open mesh cases or for systems that require a bundled fan controller or RGB lighting.

Runs at 200 to 1800 RPM with a 0.3 Sone noise floor

Under sustained load the motor maintains efficiency thanks to a modern PWM IC and dual ball bearing rated for five times the life of standard designs. Internal tests at 28 dB(A) show consistent static-pressure delivery without the speed drop-off seen in short-burst operation.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 92% of the 8,339 comparable items (median $19.99).

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Specifications

Product
Brand nameARCTIC COOLING
Product lineP12 PWM PST CO
Model nameACFAN00121A
Product typeCase Fan
Product colorBlack
Performance
Rotational speed200–1,800 RPM
Airflow rate56.3 CFM
Power
Power input connector4-pin connector + 4-pin socket
Size & build
Number of fans1 Fan
Fan depth25 mm
Bearing designFluid Dynamic
Product dimensions120 × 120 × 25 mm
Shipping weight0.17 kg
Package size127 × 122 × 28 mm
Compatibility
Compatible withCase
In the box
In the box1 x Fan
4 x Screw
Environment & compliance
Operating noise0.3 Sone
More details
Fan controlNo Controller

Questions about this item

Does my motherboard need a 4-pin PWM header to run this fan?

Yes, the fan uses a 4-pin PWM connector for power and speed control.

Can I daisy-chain this 120 mm fan with older 3-pin fans using the PST socket?

The 4-pin PST socket passes the PWM signal through, so 3-pin fans on the chain will run at full speed instead of being regulated.

How do I confirm the fan is spinning within its 200-1800 RPM range after installation?

Check the RPM reading in BIOS or monitoring software; it should vary between 200 and 1800 RPM as the PWM duty cycle changes.

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